Rotation by a non-integer amount

Question

I have to apply a very slightly rotation to an image, a rotation of less than 1º. But it looks like all the rotation commands I've found can handle only integer angles: all the non-integer measures are truncated to a whole number. Therefore, it is impossible to get a <1º rotation. I've tried to do the rotation with the \includegraphics, \rotatebox and the rotating package.

Any advice?

---

Of course, the problem is not to rotate one image but some hundreds of them. And 1º is quite relevant in a 20x20cm image inside a perfectly square frame.

Answer 1

\rotatebox should work with non integer values:

\documentclass{article}
\usepackage{graphicx}


\begin{document}

aaa{\count0=0
\loop
\rlap{\rotatebox{\the\count0}{hello world}}%
\ifnum\count0<90
\rlap{\rotatebox{\the\count0.5}{hello world}}%
\advance\count0 1
\repeat
}


\end{document}

I was asked in chat for a different example

\documentclass{article}
\usepackage{graphicx,color}
\begin{document}
a%
\def\aaa{aaaaaaaaaaaaaaaaaaaaaaa}%
\rlap{\color{green}\rotatebox{1.5}{\aaa}}%
\rlap{\color{green}\rotatebox{-1.5}{\aaa}}%
\rlap{\rotatebox{1}{\aaa}}%%
\rlap{\rotatebox{-1}{\aaa}}%%
\end{document}

Answer 2

David Carlisle's answer is perfectly correct but its example is not demonstrative.

Here is an example via TikZ (a rotation of 0.25°):

\documentclass[tikz]{standalone}
\def\mytext{Very long text to show a small rotation.}
\begin{document}
\begin{tikzpicture}
  \node[inner sep=0,anchor=west,text=red]{\mytext};
  \node[inner sep=0,anchor=west,rotate=.25,text=blue]{\mytext};
\end{tikzpicture}
\end{document}

Here the same example via \rotatebox:

\documentclass{article}
\usepackage{graphicx}
\usepackage{xcolor}
\pagestyle{empty}
\def\mytext{Very long text to show a small rotation.}
\begin{document}
\textcolor{red}{\rlap{\rotatebox{0}{\mytext}}}%
\textcolor{blue}{\rlap{\rotatebox{0.25}{\mytext}}}%
\end{document}